Telephone-switch



-(No Model.)

J. A. BLATTAU'& G. A. BOYDEN.

TELEPHONE SWITCH.

Patented Apr. 13, 1886.

INVENTORS:

WYTNESSES:

dw. X 333 Attorney.

Nv PETERS. Photo llhugnpher Fries.

JOHN A. BLATTAU AND GEORGE A. BOYDEN, OF BALTIMORE, MARYLAND- TELEPHONE-SWlTCl-l.

SPECIFICATION forming part of Letters Patent No. 8%0,028, dated April 13,1886.

Application filed February 16, 1885. Serial No. 157,119. No model.)

I0 aZZ whom it may colwcrn:

Be it known that we, JOHN A. BLATTAU and Guo. A. BOYDEN, citizens of the United States, residingat Baltimore, in the State ofMaryland, have invented certain new and useful Improvements in Telephonic Switches, of which the following is a specification, reference being ha I to the accompanying drawings.

Our invention relates to improvements in telephone-switches in which the circuitsare made, broken, and switched by altering the position of the hand-piece, and has for its ob jects, first, two chambers, each provided with a movable conducting material; second, certain arrangements of the circuit-wires in relation thereto; and, third, construction of the different parts, as illustrated in the accompar nying drawings, in which- I Figure l is a view showing the hand-piece in a vertical position, and by dotted lines in the position as when using; Fig. 2,a sectional view through the device with section line omitted toavoid confusion with the lines which designate the circuits; Fig. 3, a section on line 3;,- Fig. 4, a top and separate view of the disk provided with the central electrode; Fig. 5, a section view of the switch in a horizontal position, and Fig. 6 a sectional detail view showing the construction of same.

Similar-letters referto similar partsthrough out the several views.

The letter A designates the casing, B the magnet, Gthe cap, and D the diaphragm, all arranged in the usual manner.

The switch consists of four annular countersunk disks, (1, I), c, and (I, placed in the casing A, and in a position slightly apart and insulated from each other, therel'iy forming electrodes for their respective circuits, and forming chambersgand g, in which is placed mercury,or a movable conducting material which will shift its posit on when the situation of the hand-piece is altered, and thereby make, break, and switch the different circuits.

The disk (Z is provided with a central opening, e, through which the bell-wire f enters the chamber 9, and which is insulated from the said disk.

To the disk (Z is attached the line-wire h, which communicates or is connected to asecond telephone. The disk 0 is similar to the disk I), except it has no central opening and I is placed closely thereto, but sufficiently apart or insulated to break the circuit, with its con cave surface facing the like surface of the disk d, and the two being incased by the CilSllW A form a chamber, 9, in which is placed the mercury i.

To the disk 0 is attached the magnet-wire k, which extends from the said disk and forms the magnet B, from which it passes to the ground.

The disks a and b are formed like the disk c,and placed in their relative positions, like the ones above described, thereby forming a second chamber, in which is also placed mercury, or any movable conductor by which the circuit is made or broken by altering the position of the hand-piece. To these disks are attached the wires Z l, which are connected to the battery m, and thereby form that circuit, in which is placed the transmitter in the usual manner.

The construction of the switch is shown in Fig. 6, and consists of having the casing A formed with a chamber having diiferent diameters, in which are placed and cemented the disks corresponding in diameter to that of the casing. The disk dis first cemented toits place, with the beltwiref extending through its center, but insulated therefrom. The mercury is then placed in the concave of this disk and the disk 0 cemented to its position and prevented from coming in contact with the opposite disk by resting on the shoulder formed in the casin A layer of insulating material is then placed thereon and the disk I) cemented to its place, and mercury or a movable conductor placed therein and the disk a cemented to its place, like the disk 0, and the whole inclosed by the cap n, with the different wires attached and arranged as shown in Fig.2.

The operation is as follows: Vhen the handpiece is in a vertical position, as shown in Figs. 1 and 2, (either by being suspended or resting on a shelf provided therefor,) the mercury runs to the center of the under disks, b and (Z, by the latter being concave, which in the chamber 9 breaks the battery-circuit by not being in contact with the disk a, which leaves that circuit open as long as the handpiece is not in use or in a vertical position; but on putting the hand-piece to the ear its position is altered aiidthe mercury runs to one side and connects the two disks a and b, there by forming-the circuit.- (See Fig. 5.) In the chamber y, when the hand-piece is in a vertical position, the mercury is in sufficient quantity to extend over the insulation of the wiref. thereby connecting the said wire with the disk d, which is attached to the line-wire it. thus forming and maintaining, a closed line with the call-bell and the central ofiice or another telephone as long as the hand-piece is in a vertical position; but on altering the same the mercury runs to one side and from the center or from the wire f, which cuts out the bell and switches the line through the magnet B, from thence to the earth by the wire p, thus automatically making the desired circuits used when speaking, and also automatically breaking and shifting the same when not in use.

As shown in Fig. 1, the wires are all insulateddmnched togethenand incased in aflexible covering in the usual manner.

We are aware that having the switch in the hand-pieceottelephonesisnotnew. Therefore, havingdescribed our invention. what we claim. and wish to secure by United States Letters Patent, iS-

1. In a hand or receiving telephone, the switcn comprising, the chambers g and 9 formed by the electrodes of their respective circuits, and bothchambers provided with a movable conducting material, for the purpose as herein specified.

2. In a hand or receiving telephone-switch, the battery-line Z. connected to the battery and to the electrodes a and b. the bell-wire 1. arranged in the usual relation to the hell and -passing into the chamber g through the electvrodedmndinsulated therefrom, the line-wire h, attached to the electrode d,and the groundwire 19, attached to the disk 0, by which'the circuits are made and brok en,accordi ng to the position in which the hand-piece is placed.

3. In a telephone-switch. the casing A, the disksaand b, forming the electrodes of the battery-circuits l l, and the disksc and d, forming the electrodes of the line and bell circuits. in combination with the movable conductors arranged with their respective circuits, whereby the circuits are independent of each other.

In testimony whereof we affix onrsignatures 5o in presence of two witnesses.

JOHN A. BLA'ITAU. GEO. A. BOYDEN. Witnesses:

WM. B. NELSON, WM. BOYDEN. 

